[Xen-changelog] Here's the patch for making the otherend_changed entrypoint

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User emellor@xxxxxxxxxxxxxxxxxxxxxx
# Node ID 2ce5edc0ccbd9260037bb47c4fe1780cc5d75d44
# Parent  3f39f030fa894d29d04b748513bf48000d6a17f5
Here's the patch for making the otherend_changed entrypoint
optional.  The USB driver doesn't need this entrypoint because the state
machine driven by it is factored out of the driver code entirely into
xenidc.

Signed-off-by: Harry Butterworth butterwo@xxxxxxxxxx

diff -r 3f39f030fa89 -r 2ce5edc0ccbd 
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Wed Nov 16 
19:33:23 2005
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Thu Nov 17 
10:54:52 2005
@@ -299,8 +299,8 @@
 
        DPRINTK("state is %d, %s, %s",
                state, dev->otherend_watch.node, vec[XS_WATCH_PATH]);
-
-       drv->otherend_changed(dev, state);
+       if (drv->otherend_changed)
+               drv->otherend_changed(dev, state);
 }
 
 

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